Trap



Patented lli, 1925i?,

entren r n r i v ic JOHN F. MCKEE AND DOUGLAS B. W'IZIGHT, OF ATLANTA, GEORGIA, ASSIGNORS TO v ILLINOIS ENGINEERING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRAP.

Application filed June 23, 1822. Serial No. 570,337.

Our invention/relates to traps and more particularly refers to appliances for use with steam systems wherein the water of condensation is accumulated and automatically discharged.

The invention has specific reference to improvements in traps requiring the vertical movement of a valve stem or its equivalent, by an open vessel float-ing in water or other liquid, one of ,our objects being to increase the power and force exerted by the down and to provide a tree opening during the discharge ot the liquid.

In the drawings:

Fig. 1 is a cross sectional view of the trap chamber, with the trap in place therein.

l? ig. 2 is an enlarged cross sectional view of the trap.

tional .views taken on the respective lines X-X and Y--Y of Flu. 2.

leierring to the drawing, 1 designates the trap body, which may be circular in shape,

to which is bolted or otherwise secured the top 2 through the flanges 3 and l. Into the top portion may be inserted a flat circular composition disc 5 acting as a valve seat, 1t be- 'able pin 19. The valve stem 11 slides in the skeleton guide 10, the latter also acting as a guide for the open ended iioat chamber 17, the guide being itseliI guided in conduit 12 by outwardly flaring lugs 9 and 20 which may be cast integral with guide 10. rlhe The disc 5 is held valve stem is adapted to move vertically in recesses 8 and13 ot guide 10. 17 is an open top bucket which may be ot spun copper or the like. In the drawing, we have shown the bucket 17 and the valve mechanism in its uppermost position. e

Vlhe operation of the trap is as'tollows: Vlhe liquid such as water ot `condensation enters through the inlet Q4, and is deflected by the baille plate 26, falls downwardly into the contracted lower portion of the trap chamber 1 the blowoff outlet 28 being closed. As the water accumulates in the trap casing 1,

v the bucket 17 being empty, rises to its uppermost position, as shown in the drawing. As the water continues to enter thetrap chamber 1, it overflows into bucket 17, iilling said bucket to a point where its buoyancy is nentralized. The water, continuing to enter sinks the bucket 17, pulling down with it, valve stem guide 10, the lower end of which is bolted to the bucket 17'by bolt 16 and nut 18. It will be seen that the speed of the descending bucket is accelerated by water {iowing into it from the trap body 1. Valve 7 is, in the meantime, held to its seat 5 by the pressure in the chamber 1. Shoulder 111, cast integral with 10, descending with the bucket 17, strikes the upper `tace of shoulder 15, which shoulder 15 is formed integral with and forming the lower extremity of Sections X-X and Y-Y are cross sec-4 valve steln 11. The torce and energy of this blow is assisted by the weight of the descending members 10, 17, 1G and 18, and this force may also be considered as due to the weight ot water falling into bucket 17 from chamber 1 during the descent of the bucket. This torce is suiiicient to unseat valve 7 from valve seat 5 thereby allowing water to discharge out of bucket 17, through the vertical tube 12, through the orifice 6 in disc 5, and through the passageway 23.150 the outlet ot the trap.

After the shoulder 1li contacts the shoulv der 15, the bucket 17 and valve 7 continue their downward descent for a short distance until the base ot the bolt 1G contacts the upper face 27 of the chamber 1. Valve 7 continues to fall until the lower face of shoulder 15 strikes the bolt 16. Bucket 17 and valve 7 are now at their lowest position, valve 7 being removed a considerable distance from the valve seat 5, which position will allow of a Atree discharge of water through orifice G. All projections on parts located in the tube l2 are preferably given as near a stream line 'form as feasible, so that the velocity of the water will Vnot tend, to any great extent, to litt these parts during the discharge cycle.

rlhe weight of valve 7 and valve stem ll is made sutlicient, together with the stream line effects, so that they will remain down during the discharge cycle. As the water is discharged, the bucket gradually regains its buoyancy until it has again risen to its uppern'iost position, when valve 7 closes the orifice 6 and the discharge oit water ceases. The bucket l? is preferably designed to assist in accelerating` the speed at which it rises or falls. To accomplish this result the bucketis preferably of a larger circumference at one point to provide a stored volume of' water as shown, eliminating the necessity ol' waiting toi' the water to flow into the trap 'body through thehinlet lVe are aware that-.this Asanieeii'ect has, to a degree, been obtained'by forming the sides ot' the bucket vertical or cylindrical and by enlarging the diameter oit chamber l at the water lines, or by increasing the diameter of chamber l.

ln some types or sizes oli this trap, we

propose to use a design having practicallyV vertical sides, but the most advantageous design for the particular use intended will readily appear to those skilled in the art.

T he bottom ot the bucket is given a slight `slope dowmVard toward the center, and has rounded edges so that the skin resistance oft' the bucket will be diminished, this tending to increase the speed of the bucket when descending. rhis design also gives the bucket greater rigidity. Only suliicient water remains in the bottom oit the bucket to form a water seal at the lower end ot tube 12. 2l is a washer for strengthening the bottom of the bucket. is a tapped hole for an air discharge valve. 2S is a tapped opening for av blowout.

rfhe object of the preferred shape of float chamber shown,l is to allow ior maximum buoyancy when partially submerged.l It will be apparent that as the li-oat chamber descends, there will be a gradually increasingy downward orce to unseat the valve. rlhe valve stein and parts rigidly connected. thereto are preferably 'of a suilicient weight to prevent lifting by impact action of the liquid discharged.

lVe are aware that there are traps in use having a vtrap body with a cover, central discharge tube and reversible valve seat, and provided with the usual inlet, outlet and batlie plate, to which construction, we mak no claims of invention.

It may be pointed out that it is preferable to restrict the diameter ot the bucket at substantially the height of the line ot buoyancy.

vWe claim as our invention:

1. In a steam trap or the bucket type having a. single valve, the combination with a bucket, of a guide member having an internal longitudinal opening movable with, attached to, and projecting upwardly within the bucket, a single valve and elongated valve stem loosely 'mounted for independent guidedV movement in said opening in the guide member and seating above the line of buoyancy ot the bucket on a discharge port having direct communication with the trap outlet, means carried by the guide and projecting into said opening adapted to make contact with a head on the valve stem for actuating the single valve Vand valve .stem at'ter the bucket and guide have First had an independent movement, said valve being adapted to seat upwardly and unseat downwardly.

2. In a steam trap of the bucket type hav ing a single valve, the combination with a bucket, said bucket being reduced in diameter above the line of buoyancy, of a guide member having an internal longitudinal opening movable with, attached to, and projecting upwardly within the bucket, a single valve and elongated valve stem loosely mounted for independent guided movement in said opening in the guide member and seating above the lino ot' buoyancy of the bucket on a discharge port having direct communication with the trap outlet, means carried bythe guide and projecting into said opening adapted to make contact with a head on the valve .stem for actuating the single valve andv valve stem after the bucket and guide have iirst had an independent movement, said valve being adapted to seat upwardly and unseat downwardly.

JNO. F. MCKEE. vDOUGLAS B. lVRlGl-ll. 

